Lath board



Dec. 15, 1925 s. M. FORD,

LATH BOARD Original Filed Nov. 2

[VI/41708 Jaw/715,64 a) M 427224 5) Patented Dec. 15, 1925.

UNITED STATES PATENT OFFICE.

SILASM. FORD, OF ST. PAUL, MINNESOTA; CLARA 1. FORD, EXECUTRIX OF SAIDSILAS M. FORD, DECEASED, ASSIGNOR TO CLARA 1. FORD, 013 ST. PAUL, MINNE-SOTA.

LATH BOARD.

Application filed November 23 1920, Serial No. 426,020.

To all whom it may concern:

Be it known that I, SrLAs M. Form, a citizen of the United States and aresident of St. Paul, in the county of Ramsey and State of Minnesota,have invented certain new and useful Improvements in a Lath Board, ofwhich the following is a specification.

One object of my invention is to provide in a lath board formed offlexible sheeting, improved means for retaining the said sheeting inplace.

Another object of my invention is to provide in a lath board formed offlexible sheeting and having alternating lath like faces andintermediate depressions, means for positively supporting the facesthereof from collapsing.

VVit-h these and incidental objects in view, the invention consists ofcertain novel features of construction and combination of parts, theessential elements of which are hereinafter described with reference tothe drawings which accompany and form a part of this specification.

In the drawing, Fig. 1 is a perspective view of a fragment of myimproved lath board: If 2 is a section taken on the line 2-2, Fig. 1;and Fig. 3 is a similar view of a modified form of my invention.

The waterproof paper 1 is formed as shown into dove-tail shaped plaitsthereby producing alternate lathlike faces 2 and 3 respectively.

These lathlike faces are connected by webs 4; and the flat wire 5pierces the webs 4: as shown more clearly in Fig. 2 and this wire is ofsuch a width as to completely fill the space between the inner surface 6of the lathlike face on one side of the sheet and the inner surface 7 ofa similar lathlike face on the opposite side of the sheet so that all.of the lathlike faces of the sheet of lath board so formed arepositively supported. and prevented from collapsing by this wire.

In my Patent Number 1,156,866, October 12, 1915, for lath board, Ishowed reinforced strips 6, which were intended to reinforce the formlath board shown in that patent and which is of the same generalcharacter as the lathboard shown herein.

IVhen, however, I began to manufacture this lath board .011 a commercialscale I Renewed July 24, 1925.

found it advantageous to market the lath board in flat sheets ratherthan in rolls.

When the lath board as produced under the said patent was made in flatunits and these units piled one on top of the other for shipment, Idiscovered the weight of the sheets superimposed, one on the other wouldflatten out the corrugations so the resulting board received by thecustomer would be shorter than when manufactured, the thickness of thelath board would be less and the hey space between the lathlike faceswould be shortened and the reinforcing wire would project out beyondeach end of a sheet of lath board. In cases where the board was notflattened in shipment it would flatten down when laying plaster over itso the board was yielding instead of rigid.

To obviate this trouble I devised the means herein described and whileat first glance it seems a small matter to use a fiat wire of a certainwidth, I find it a very important factor in the production of lath boardto use a wire of such width that the lathlike faces are positivelypositioned and supported as there can be no variation in shipment of thethickness of the lath board, key sf aces or over-all length of thesheet.

In the construction shown in Fig. 3, I obtain approximately the sameresult as shown in Fig. 2; in this case, however, the reinforcing wire 8may be either round Or square and is bent at 9, 10, 11 and 12 so a wireof ligl'lt weight may be used to give support to the lathlike face inthe same general way as does my preferred construction heretoforedescribed.

In either of the embodiments shown I prefer the plait form shownalthough this same reinforcing means may, of course, be embodied in anyform of corrugated sheet.

IVhile I have described my invention and illustrated it in twoparticular designs, I do not wish it understood that I limit myself tothese constructions, as it is evident that the application of theinventions may be varied in many ways within the scope of the followingclaim Claims:

1. In a lath board formed of a sheet of flexible material thecombination of a plurality of lathlike faces alternately disposed onboth sides of the lath board so formed, webs connecting said alternatingfaces and reinforcing means passing through said Webs and lying insurface contact with the inside surface of said lathlike faces.

2. In a lath board the combination of a sheet of sultabie inaterlalcorrugated lnto a dove tall sheet formation having alternating lathlikefaces and depressions on each side thereof, webs connecting saidalternating 0 iathlike faces, and a flat wire piercing said webs and ofsuch a Width and so positioned that said wire lies against and supportsthe inside surface of each of said lathlike faces.

SILAS M. FORD.

